the safest wallet is the offline wallet but there is still a risk that if the pc where you keep the offline wallet is destroyed then you can not do anything
Are you saying that if I purchase a Ledger Nano S, plug it into my HP laptop, set the two up use my Samsung S7 phone to buy bitcoin from an ATM, load the code & key onto my Ledger Nano S and then have my HP laptop stolen that all Bit / Altcoin on that PC are just gone? As I understand it I have to set up a Hot Mobile Wallet to interact with the the ATM scanner and then transfer it to my PC. Tks